/*
 * Copyright 2005-2013 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.ldap.core.support;

import org.springframework.ldap.core.ContextSource;
import org.springframework.ldap.core.DistinguishedName;

import javax.naming.ldap.LdapName;

/**
 * Support class to provide {@link BaseLdapPathSource} functionality to ContextSource instances
 * that act as proxies.
 *
 * @author Mattias Hellborg Arthursson
 * @since 2.0
 */
public abstract class DelegatingBaseLdapPathContextSourceSupport implements BaseLdapPathSource {

    /**
     * Get the target ContextSource.
     * @return the target ContextSource.
     */
    protected abstract ContextSource getTarget();

    private BaseLdapPathSource getTargetAsBaseLdapPathSource() {
        try {
            return (BaseLdapPathSource) getTarget();
        } catch (ClassCastException e) {
            throw new UnsupportedOperationException("This operation is not supported on a target ContextSource that does not " +
                    " implement BaseLdapPathContextSource", e);
        }
    }

    @Override
    public final LdapName getBaseLdapName() {
        return getTargetAsBaseLdapPathSource().getBaseLdapName();
    }

    @Override
    public final DistinguishedName getBaseLdapPath() {
        return getTargetAsBaseLdapPathSource().getBaseLdapPath();
    }

    @Override
    public final String getBaseLdapPathAsString() {
        return getTargetAsBaseLdapPathSource().getBaseLdapPathAsString();
    }
}
